Whiteline Adjustable Rear Sway Bar 22mm – 2016-2017 Ford Focus RS

Whiteline Adjustable Rear Sway Bar 22mm – 2016-2017 Ford Focus RS

Tune the Rear Balance on Your Focus RS
The Whiteline BFR78Z is a 22mm adjustable rear sway bar for the 2016-2017 Ford Focus RS. The RS’s rear torque vectoring differential and AWD system are sensitive to rear roll stiffness calibration — a properly tuned rear bar complements the electronics rather than fighting them. Whiteline’s adjustable unit provides three positions to dial in the rear stiffness for different driving conditions and use cases.

DETAILS

• 22mm 3-point blade adjustable rear sway bar
• Solid spring steel, silver powder coat
• Includes mount bushings and hardware
• 3 adjustment positions
• Fitment: 2016-2017 Ford Focus RS
• Direct bolt-on installation

Focus RS Rear Differential and Sway Bar Interaction
The Focus RS uses a mechanical rear limited-slip differential with electronic torque vectoring. The rear sway bar stiffness directly affects how the rear suspension loads under cornering, which in turn affects how the differential and torque vectoring system behave. A well-calibrated rear bar provides the electronic systems with a more stable, consistent platform to work from.

Three Positions for Conditions and Setup
Middle position works well for most RS driving on varied roads and circuits. The stiffer outer position maximizes rear roll control for track days on smooth surfaces. The inner position is a softer tune for rougher roads where rear compliance is desirable.

Complement With the Front Bar
Whiteline produces a front sway bar for the Focus RS (BFF96Z). Pairing front and rear bars allows full tuning of the RS’s roll stiffness distribution — the complete approach for a car as sophisticated as the RS.

Why Choose Whiteline

Whiteline has been engineering suspension components from their facility in Australia since 1979. Every product in their catalog is developed with a clear goal: measurable improvement in handling, stability, and tyre contact. Whiteline’s polyurethane bushings, sway bars, control arms, and alignment correction kits are engineered using finite element analysis and validated on track before they reach the market. Their components are direct-fit, bolt-on solutions designed for enthusiasts who want real performance gains without fabrication or custom work.

The RallySport Take

A well-engineered rear bar for one of the most capable front-wheel-biased AWD cars ever produced. The adjustability is important on a car where balance matters as much as raw stiffness. Installation is a straightforward bar swap — remove the OEM bar, install the Whiteline unit with the provided polyurethane mount bushings, connect the endlinks. Start in the middle adjustment position and move from there. Adjustable endlinks are a worthwhile companion purchase if the car has been lowered, ensuring the bar operates at zero preload at the new ride height.

What’s in the Box

• 22mm 3-point blade adjustable rear sway bar
• Solid spring steel, silver powder coat
• Includes mount bushings and hardware
• 3 adjustment positions

Fitment